I just want to clear something up that has been bugging me lately. So E=mc2=mo(gamma)c2.
Say a proton is accelerated from rest to some relativistic speed. It's gain in energy is only from a gain in kinetic energy which can be found by the mass-energy equivalence principal. So is it correct to say that ET=mo(gamma)c2 such that Ek= mo(gamma)c2 - moc2
mo=Rest mass
ET=Total energy
EK=Kinetic energy of proton